changing font size in all the elements of figures

Hello, i want to make bigger all the text in a figure ( title, xlabel, axis,....), so i wrote this line of code in the beginning of the script: set(0,'defaulttextfontsize',30) but it doesn't change anything at all. Could you help me please, how can i change the font size? thank you

[Rong Yu]

Try this

set(gca,'FontSize',30)

[Sunisa Prasopporn]

I would like to change 'FontSize' in clustergram heatmap. How should write the coding.

[Bhanu Vardhan]

Works for me. Thanks!

[Erick Oberstar]

this no longer works with rlocusplot Any work around?

[Adam Danz]

@Erick Oberstar See my answer below.

sys = tf([2 5 1],[1 2 3]);
rlp = rlocusplot(sys);
fontsize(rlp,20,'points')

Answer 1

[onewhaleid]

I use findall to change the font size for all text in a single figure:

set(findall(gcf,'-property','FontSize'),'FontSize',12)

[hamza hamza]

thank you. Using set(0,'defaultaxisfontsize',30) changes the font of all texts in any figure.

[Jon]

The correct property name is 'DefaultAxesFontSize', as written above you will get an error. Otherwise this does work.

[Walter Roberson]

DefaultAxesFontSize is a better programming practice, but when you use set() the property names are not case sensitive.

set(0,'defaultaxisfontsize',30) or set(0, 'DefaultAxesFontSize', 30) only works for axes text created after the call to set(); it does not change the size for any existing text object, which the findall() version does change.

[David Franco]

Works perfectly @onewhaleid. Thanks! +1

Answer 2

[Adam Danz]

Starting in MATAB R2022a you can use the fontsize command.

For example, to set the fontsize to 15 points for all* text in a figure fig,

fontsize(fig, 12, 'points')

Or all* text in an axes ax

fontsize(ax, 12, 'points')

Or you could increase or decrease fontsize using a scaling factor so that relative differences in font size are maintains.

fontsize(__,scale=1.2) % increase 
fontsize(__,scale=0.8) % decrease
fontsize(__,'increase')
fontsize(__,'decrease')

* Some objects do not respond to the fontsize command

Answer 3

[Walter Roberson]

http://uk.mathworks.com/matlabcentral/answers/221149-is-it-not-possible-to-change-every-font-size-on-plots-at-the-same-time

[hamza hamza]

thank you